Improvement in machines for covering insulated wire with lead or other ductile metal



vUNITED STATES PATENT OFFICE.' v

SAMUEL cqersnor, on new YORK, N. Y.

lMPRGVYEMENT lN MACHINES FOR CGVERlNG INSULATED WIRE WITH LEAD 0R OTHER DUCTILE METAL.

Speciiication forming part of Letters Patent No. I 23481, dated June 9,'1857.

To ult-whom t may concerm Beit known that I, SAMUELU. BISHOP, -of the city, county, and State of New York, have invented a new and useful Protected Insulated Electric and Galvanic Conductor, and new and useful improvements in the process and machinery for making the same, of which the fol- A lowing is la specification.

` sels between the lead and the insnlated-wire,

to prevent the caloric passing into and 4heating the insulating-gum, thereby keeping the gum coating cool, as it and the melted metal l move along von opposite sides of substances which would otherwise furnish an easy passage of the caloric from the metal to the gum, thus securing the proper relative temperature ofthe hot metal and the cold. gum while they are moving in the same direction toward and by the time they reach the pointof union by the action of an interposed current of Huid.

My improvement in the machine employed in my said processto'produce my said manufacture consists lof' a combination-of tubes, or other equivalent conductors for a current -of uid, with the die.

The whole machine used consists, essentially, of a tube through which the insulated wire passes, a vsecond tube surrounding the first and forming an annular ring or space between the two for the circulation of fluid, a hollow point at the end of the last-mentioned tubeof a caliber of such size that the insulated wire being coated with gutta-percha or india-rubber will pass freely but closely through it, a plunger fitting the leadchamber and with a hole in it to receive the outer tube, and a lend-cham y ber with a hopper to receive the lead, a die into which the point of the outer tubejust enters, leavinga sufficient space around it to allow the lead lo pass into the die and around the gum, an inlet and outlet at the end-"of the f tubes opposite'to that of the die for admission and emission of the current of fluid, and all supported by a suitable frame-work, and connected with a hydraulic press, as hereinafter described.

l will now describe my invention and the parts thereof 'and its operation more in detail, reference heilig had to the drawings herero annexed, in all of the tigures of which like numerals and like letters represent like parts.

Figure l is a side elevation of the machine.

Fig. 2 is a vertical section. Fig. 3 is a longitudinal section of a pieceof the new manufacture. Fig. 4 is a transverse section of the same.

A is a frame or table supporting the cylinder and other parts, and which may be made in the -form of a square bench, widest at thc bottom, with a ange at the top, to surround the bottom of the cylinder to keep it from slipping off, or in any other-suitable form.

R .is the lead-cylinder, and receives the lend into the chamber M, which is poured iutoit through a suitable opening or hopper at the top. This c vlinder has the upper external Ypart made square, and projecting sufciently to form a shoulder or ange for the purpose of being taken hold of by the clamps or supports U C. Y

D is the bottom to the lead-cylinder, and is securely bolted to the cylinder by the bolts l l, so as to resist the downward pressure of the ram.

F is a die fitted into the bottom D, which die I make circular on the outside, and on the inside it may be of any form in which it is desired to have the outside coating after finished; but it is most commonly used, and in the drawings it is represented circular on the inside, with a borev large enough to allow of a coating of lead sufficiently thick to form around the gum which covers the wire.

J is a tube or conductor passing down:

through the machine from the top to the die, terminating atthe end, iu a hollow steel point, 2, of the proper form and size to allow the wire with its coat of gum to pass easily through it, but at the same time not so loosely as to allow water to pass between the gum and the inner surface of this point. The distance ot' this pointfrom or into the die can be regulated by means of the nut It, screwed onto the tube J and resting on the head of' cylinderH. The hollow steel point 2 and the die F are both movable, so that any others can he substituted adapted to any form andsize of' the insulated wire.

O is a tube extending through the bor-c of' the cubed-from near the lower end of t-say from -1--toend outotthe top ofit, and terminating in the bottom of the cup l, to which it is soldered or otherwise attached, and communicates with the inside of the cup. The bottom of this cup l is screwed upon the upper end oi' the tube J. The insulated wire 5 is to Y be passed through this inner t-ube,land` its size is to be such as to leave an annular space between its inner surface and the gum coating the wire sufficiently wide for a currentf'of fluid to ow through it, and the relative size of the tube J and tube O must be such as to leave an annular 'space between them also wide enough for the circulationof fluid.

The tube mcommunicates with the waterspace between the two tubes, and the tube n communicates with the inside of the cup l, and through that with the inner tube, O, so'thatil' the water bel forced into the tube M it will travel down the vwater-space between the tubes at 4, where, passing under that tube, it will enter the space between lthe sides of the inner tube and the gum on the wire and travel up that space to the top and be delivered into the cup l, and thence run oi' through the tube n; or if water be forci d down through the inner tube it, traveling the opposite direction from that described, will be discharged from the tube m, and in either case there willbe a current of water preventing the insulating-gum from being heated.

The article, as it cernes from thedie through the bottom D, should be received into cold water to thoroughly cool it as fast as formed'.

Other tluids.1nay be used instead of water,- but water is best.

The mode and means of operating is asfollows Acurrent of water or other iiuid is started through the water-courses, as described,` the wire covered with the gum is entered into the inner tube through the bottoni of the 'cupl and pushed down until it enters the ldie F.

The melted ni'ctal is then poured into the re-4 .whereupon the inetal will be forced ont of the chamber M through the die, and as it leaves the steel point 2 is closed around the gum, and with suflicient impingement `todraw the wire down as it (the metal) alliances, so that each part of 'theinsulated wire in succession is caused to pass the point where' the vmetal leaves the steel point 2, and is therefore at that point exposed to the action of the metal, and ihis,too,alterthe proper condition of telnperature has been obtained between them.

In this proc` ss it is obvious thx.; to subject the gum which insulates the wire to the heat which unarrested would be communicated to it froin-the lead through the tubes would practically destroy the gum.

The conditions land operations in reference t0 temperature and the method of keeping; the

gum at a low temperature while the lead around the outer'tube, when pressed int-o they chamber, must be ot' a high temperature,and

the process `'of disposing of the surplus caloric is as follows: The tube J', being a good conductor, when the hot lead comes into contact with it, readily and rapidly conducts caloric Vfrom the lead to the inside surface of the tube.

Along this inside surface of the ,tube is constantly owing the current of water, which enters cold at the end of vthe tube. This water receives the caloric from the inner surface ot' the tube J and bears it on with it to the placev of exit, where it is thrown out withthe'waste water, and thus, to render it practicable to pass the lead hot along'and against the outer surface of the tube J, and the gum to remain cold while being passed in the saine direction vvthrough the tube O, a proper agent is4 kept 'traveling between the lead and the gum to this is used the ordinary hydraulic vpressrnustl be n dapted to and'combined with theother parts I described, as shown in the drawings, where H is the water-cylinder. G is the piston, with a hole through it for the tubes above described operating upon the'plunger, and for that purpose may be attached to the ram or plunger E,

or the piston 'and plunger may be made in oney piece.

I.' is a packing-ring bolted firmly on the lower end of the cylinder H, to form abottom to the annular space 6 outside of the piston.

This'space is packed topv and bottom to make' it water-tight. As the tube J passes through the piston and out of the top of the cylinder H it is exposed to the water between the top of the piston and head of thecylinder H, and

therefore requires to be suitably packed to make thejoints water-tight. This may be done by the cup-packing', as shown in the'drawings, 8 being the leather, and 9 metallic plates holding the leather by the screws 10.

The pipep is t0 conduct the water into the cylinder H.

What I claim as my invention, and desire to secure by Letters Patent in this application, is

Causing' the metal and insulated wire to move in 'separate channels'towai d a die, where they are to be united, and prm'enting theguin from being heated while it and `the lead advance toward the die by'a current of iinid passing in a suitable vessel or vessels between the metal and gum to vreceive and carry oii' the caloric, all substantially as described.

AMUEL C. BlSHOl).

in presence oili). T. CAs'roN, MILES B.. Annees. 

